How To Choose A Sunlight Readable Monitor

Anyone who takes a laptop outdoors on a sunny day will know that standard LCD screens cannot support well in very bright environments. The main reason for this is that the backlight on the screen must compete with the incident sunlight, and the sun will inevitably be brighter.

In outdoor-readable displays, the display should be bright enough so that the display can be seen under strong sunlight, and the contrast of the display must be maintained at 5 to 1 or higher. Although it is possible to read a display with a screen brightness of fewer than 500 nits and a contrast ratio of 2 to 1 in an outdoor environment, the quality of the monitor will be very poor. The best sunlight-readable monitor is usually considered an LCD with a screen brightness of 1000 nits or higher and a contrast ratio greater than 5 to 1. In a dark outdoor environment, this Outdoor display can provide excellent image quality.

These are the key features that enable us to choose the best sunlight-readable display or outdoor monitor.

High Brightness

The daylight visible screen has an ultra-bright backlight, which helps to promote the image in high ambient light conditions. The standard brightness measurement for LCDs is (candlesticks per square meter) cd/m2 or Nit.

nit is equal to 1 cd / m2, so these terms are interchangeable. Candela is the standard unit of brightness and it is measured on a standard area of 1-meter square for the screen. LCD screens used for desktop monitors have usually rated anywhere between 250cd/m2 and 450cd/m2 and large public display monitors range from 350cd/m22 to 700cd/m2. Some manufacturers claim that 700cd/m2 is a high-brightness screen, which is technically true, but it is not classified as visible light. Generally, anything higher than 1000cd/m2 can be regarded as a daylight screen, but as with most technologies, the bigger the better. Screens rated at 2500cd/m2 and above will produce excellent results in very bright conditions. Currently, the brightest LCD available has a rating of 5,000cd/m2.

High working Temperature and Thermal Management

A lot of power is consumed by a high-brightness backlight system and it becomes the source to increase the LCD temperature. The brighter the backlight, the greater the heat dissipation problem. In addition, if the LCD is used under sunlight, more heat will be generated due to sunlight. This problem affecting LCD panels used in sunlight is that they are easily damaged by solar heat. When the liquid crystal layer is heated, the crystals warp, forming dark spots on the screen. If removed from the heat source, these patches will usually cool and return to normal, but repeated exposure will eventually cause permanent damage.

The heat of the sun interferes with the color of the screen. Ordinary displays or LCDs can be used less than 50 degrees, and these TFT LCDs can turn black at 50 degrees. The temperature problem can be solved by proper thermal management design. LCD panels used in professional high-brightness displays can be used in extreme temperatures without warping or turning black.

Color Generation

However, having a bright backlight alone does not make the LCD screen look good. Merely turning on the light source behind the screen may result in fading, poor contrast, and disappointing images. To produce realistic images, the screen needs high contrast and accurate color reproduction. The full matrix LED backlight can provide high brightness, but combined with local dimming, it can create a high-contrast image with deep black levels. By calibrating the color of the screen can help to produce more natural colors. Many LCD screens tend to cast blue, causing colors to look cool. Ensuring that the screen is properly calibrated helps to maintain true color reproduction, so that skin tones look natural and whites look like pure white.

Waterproof

The outdoor-readable display has a waterproof stainless-steel housing. These are ideal choices for factory flushing environments. In addition, they are very suitable for outdoor use in inclement weather. The panel mount case is made of aluminum or stainless steel and this allows them to be embedded and mounted. Outdoor LCD monitors with high brightness can work in a wider temperature range. Therefore, this broadens the environment in which they can be used. In addition, the temperature range is also very important when used outdoors. When we combine extreme operating temperatures with outdoor waterproof enclosures, we ensure that high-brightness monitors can work normally even in the harshest, most humid, and hot environments.

Viewing Angle

The viewing angle refers to the angle at which the image quality of the LCD is degraded and is unacceptable for the viewers. When the observer moves to the side of the LCD, the image on the LCD will degrade in three ways.

The brightness drops

The contrast usually drops at a large angle

The color may change

The definition of LCD viewing angle is not absolute, because it depends on your application. For LCDs used in outdoor applications, it is not enough to define viewing angles based on CR alone. In very bright ambient light, when the screen brightness drops below 200 nits, the display is almost invisible.

A high-quality, high-brightness screen looks good in any situation. Whether the content is installed internally or externally, the increased brightness can make your content shine. Sunlight-readable displays using transflective displays are very suitable for personal use because they do not require a lot of power and are affordable.